Everlast POWER MTS 221STi, Руководство оператора

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mode, the weld will be much cleaner, with less
porosity at both the beginning and the end of the
weld. Additionally the wire ball will not be oxi-
dized, reducing the need to trim the wire before
starting. However, if you are trying to conserve
MIG gas, the Pre and Post
- flow time may be set
to “0.0” if the MIG welding is not of a critical na-
ture. For best results, set Pre - flow time for
about .5 seconds and Post - flow time for at least
2 seconds. Add more time as amps are in-
creased if needed. While In TIG mode, Pre
- flow
is required to prevent balling and oxidation of
the tungsten when the arc is struck. It also helps
to flood the area to be welded with shielding gas
before the arc is initiated. Post
- Flow in TIG
mode is also essential to providing shielding of
the tungsten and weld as they cool together to
prevent oxidation of the tungsten and porosity in
the coalescing weld. As a starting point, set at
least .2 seconds Pre
- Flow time. For Post - Flow set
approximately .5 seconds of Post - Flow for every
10 - 12 amps used. HINT: The arc start of both
MIG and TIG will be delayed until the Pre - Flow
time has been satisfied. This is not considered
to be a fault. The arc simply cannot be started
until the defined amount of Pre
- flow time has
expired. If arc start feels excessively delayed,
check your Pre
- Flow settings.
4. MIG and TIG Upslope/Downslope. This control
is active in both MIG and TIG modes. In the TIG
mode, the function is only necessary if you are
operating with the Torch switch instead of the
foot pedal. If operating in either TIG mode with
a foot pedal, set both Upslope and Downslope to
“0.0” if the programming allows. (Some program
versions may allow adjustment of slopes with the
foot pedal while others may block this feature
with the foot pedal.) In TIG mode, Upslope ad-
justs the amount of time it takes for the amps to
be raised from the minimum arc start amps to
the maximum selected amps. Start amps are
factory preset and this point is not adjustable.
Downslope is similar in TIG mode except it is the
amount of time it takes for the unit to decrease
Amps from the maximum set amps to the mini-
mum arc termination amps. End amps where
the arc is terminated is factory pre
- set and non-
adjustable. For MIG operation, the up and down
slope functions are similar in concept, except the
unit is actually upsloping and downsloping wire
feed speed, expressed in Amps.
MIG Upslope
changes the wire run - in (ramp - up) speed to help
soften (or increase) the run - in effect. The run in
works similar to MIG hot start and has a similar
effect, helping to reduce porosity at the beginning
of the weld.
For MIG Downslope, the goal is to help
aid in filling the weld crater. This is works with the
final motion of the trigger, to gradually cool the
weld and fill the crater just before the arc termi-
nates.
Note: In MIG 2T and 4T mode, the arc will
continue once the trigger is released to help assist
in crater filling and prevent possible weld crack-
ing.
This effect may be disconcerting at first, espe-
cially if burn back time is added to the down - slope.
To help eliminate any “ broken ” arcs, simply hold
the torch in place to allow the unit to “ wind ” down
the feed rate and initiate the burn back and any set
post gas flow. Using these features can greatly
increase weld quality. The amount of time allowed
for slope (Up or Down) is different than TIG be-
cause of the short run
- in time that is programmed
into the machine and the limited time needed for
crater filling. If the standard run
- in is satisfactory
or standard operation is desired, either of these
settings may be kept at
“0”.
5. MIG Wire Speed, TIG and Stick Amps. Amperage,
simply described, controls penetration during
welding. Amp adjustment is allowed in all modes.
However in the standard MIG and spool gun
modes, Amps are controlled by adjusting the wire
feed speed rate in Inches Per Minute (IPM). The
faster the wire feeds into the puddle, amperage
will climb proportionately according to the wire
size. The larger the diameter of the wire, the slow-
er the wire needs to feed to obtain the same am-
perage. In the same manner, more wire speed is
needed with a smaller diameter wire to obtain an
equal amp value of a larger diameter wire.
You
will notice as you set up the synergic mode that
the unit displays selected amperage instead of
wire feed speed (IPM).
This is because the syner-
gic mode, requires you to enter the wire diameter
and wire type. This allows the unit
’ s programming
to accurately pre - figure amps being set based off
these two parameters. Amps are a more accurate
figure to use in this situation. Regardless of what
process is selected, the function of the display
changes to reflect the real time amp output while
welding. If adjustments are completed, the unit
will default to back to Amps within 3 seconds. If
used in the Pulse TIG mode, the unit will default to
“ TIG Pulse Amps. ”
6. MIG Volts. Voltage dictates the height and width of
the bead while MIG welding. If Voltage are set too
Setup Guide and Component Identification Section 2